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Loans and Leases - Quality of Loans Held for Investment (Parenthetical) (Details) - Taxi Medallion Loans - Commercial and Industrial - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Loans 90 Days Or More Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Past Due Loans $ 18,600,000 $ 30,400,000
Financing Receivable, 30-89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Past Due Loans $ 0 $ 0